<template>
  <el-upload
    class="avatar-uploader"
    action="https://run.mocky.io/v3/9d059bf9-4660-45f2-925d-ce80ad6c4d15"
    :show-file-list="false"
    :auto-upload="false"
    :on-change="handleChange"
  >
    <img v-if="props.avatar" :src="uploadAvatar" class="avatar" />
    <el-icon v-else class="avatar-uploader-icon"><Plus /></el-icon>
  </el-upload>
</template>

<script setup name="">
import { defineEmits, defineProps } from "vue";
import { computed } from "vue";
import { Plus } from "@element-plus/icons-vue";

//每次选择完图片之后的回调
const props = defineProps({
  avatar: String,
});
//定义可以触发的自定义事件
const emit = defineEmits(["uploadChange"]);

const uploadAvatar = computed(() =>
  props.avatar.includes("blob")
    ? props.avatar
    : "http://localhost:3000" + props.avatar
);

const handleChange = (file) => {
  //一旦有文件修改，则触发自定义事件,并传递数据
  emit("uploadChange", file.raw);
};
</script>

<style scoped>
::v-deep .avatar-uploader .el-upload {
  border: 1px dashed var(--el-border-color);
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--el-transition-duration-fast);
}

::v-deep .el-upload:hover {
  border-color: var(--el-color-primary);
}

::v-deep .el-icon.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  text-align: center;
}
.avatar {
  width: 178px;
  height: 178px;
}
</style>
